Someone told me to wash your car with dish soap. He said that the reason a dish comes out so shiny is because the soap has wax in it.
I believe him, I only use dish soap and my vehicles always get questions like "what do you use for wax" and "did you have the clear coat re-done". I haven't done either.
I have some fancy, expensive bottle of "car wash soap" I got as a Christmas gift years ago. I use it from time to time and see no difference in my wash jobs.
Take that however you want.
Keep in the back of your head, this is Moparts: you'll get answers from Folks that still believe in armor all, tire shine and "cold" air kits.